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    <p>Direct link to awk version : <a href="http://www.shelldorado.com/scripts/cmds/urlencode" rel="nofollow noreferrer">http://www.shelldorado.com/scripts/cmds/urlencode</a><br> I used it for years and it works like a charm</p> <pre><code>: ########################################################################## # Title : urlencode - encode URL data # Author : Heiner Steven (heiner.steven@odn.de) # Date : 2000-03-15 # Requires : awk # Categories : File Conversion, WWW, CGI # SCCS-Id. : @(#) urlencode 1.4 06/10/29 ########################################################################## # Description # Encode data according to # RFC 1738: "Uniform Resource Locators (URL)" and # RFC 1866: "Hypertext Markup Language - 2.0" (HTML) # # This encoding is used i.e. for the MIME type # "application/x-www-form-urlencoded" # # Notes # o The default behaviour is not to encode the line endings. This # may not be what was intended, because the result will be # multiple lines of output (which cannot be used in an URL or a # HTTP "POST" request). If the desired output should be one # line, use the "-l" option. # # o The "-l" option assumes, that the end-of-line is denoted by # the character LF (ASCII 10). This is not true for Windows or # Mac systems, where the end of a line is denoted by the two # characters CR LF (ASCII 13 10). # We use this for symmetry; data processed in the following way: # cat | urlencode -l | urldecode -l # should (and will) result in the original data # # o Large lines (or binary files) will break many AWK # implementations. If you get the message # awk: record `...' too long # record number xxx # consider using GNU AWK (gawk). # # o urlencode will always terminate it's output with an EOL # character # # Thanks to Stefan Brozinski for pointing out a bug related to non-standard # locales. # # See also # urldecode ########################################################################## PN=`basename "$0"` # Program name VER='1.4' : ${AWK=awk} Usage () { echo &gt;&amp;2 "$PN - encode URL data, $VER usage: $PN [-l] [file ...] -l: encode line endings (result will be one line of output) The default is to encode each input line on its own." exit 1 } Msg () { for MsgLine do echo "$PN: $MsgLine" &gt;&amp;2 done } Fatal () { Msg "$@"; exit 1; } set -- `getopt hl "$@" 2&gt;/dev/null` || Usage [ $# -lt 1 ] &amp;&amp; Usage # "getopt" detected an error EncodeEOL=no while [ $# -gt 0 ] do case "$1" in -l) EncodeEOL=yes;; --) shift; break;; -h) Usage;; -*) Usage;; *) break;; # First file name esac shift done LANG=C export LANG $AWK ' BEGIN { # We assume an awk implementation that is just plain dumb. # We will convert an character to its ASCII value with the # table ord[], and produce two-digit hexadecimal output # without the printf("%02X") feature. EOL = "%0A" # "end of line" string (encoded) split ("1 2 3 4 5 6 7 8 9 A B C D E F", hextab, " ") hextab [0] = 0 for ( i=1; i&lt;=255; ++i ) ord [ sprintf ("%c", i) "" ] = i + 0 if ("'"$EncodeEOL"'" == "yes") EncodeEOL = 1; else EncodeEOL = 0 } { encoded = "" for ( i=1; i&lt;=length ($0); ++i ) { c = substr ($0, i, 1) if ( c ~ /[a-zA-Z0-9.-]/ ) { encoded = encoded c # safe character } else if ( c == " " ) { encoded = encoded "+" # special handling } else { # unsafe character, encode it as a two-digit hex-number lo = ord [c] % 16 hi = int (ord [c] / 16); encoded = encoded "%" hextab [hi] hextab [lo] } } if ( EncodeEOL ) { printf ("%s", encoded EOL) } else { print encoded } } END { #if ( EncodeEOL ) print "" } ' "$@" </code></pre>
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